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quakeforge/libs/util/test/test-seb.c

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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "QF/mathlib.h"
#include "QF/mersenne.h"
#include "QF/sys.h"
#define SIZEOF(x) (sizeof(x) / sizeof(x[0]))
const vec3_t points[] = {
{-1, -1, 1},
{ 1, 1, 1},
{-1, 1, -1},
{ 1, -1, -1},
{-1, -1, -1},
{ 1, 1, -1},
{-1, 1, 1},
{ 1, -1, 1},
{ 0, 0, 0},
};
// This particular triangle from ad_tears caused SEB to hit its iteration
// limit because the center in affine hull test failed due to excessivly tight
// epsilon. Yes, a rather insanely small triangle for a quake map. Probably
// due to qfbsp not culling the portal for being too small.
const vec3_t tears_triangle[] = {
{2201.82007, -1262, -713.450012},
{2201.8501, -1262, -713.593994},
{2201.84009, -1262, -713.445007},
};
const vec3_t tears_triangle2[] = {
{-519.989014, 1111.94995, -2592.05005},
{-520.002991, 1112, -2592.02002},
{-520.005005, 1112, -2592.04004},
};
const vec3_t tears_triangle3[] = {
{284, 624, 2959.76001},
{284, 624, 2960},
{284.234985, 624.471008, 2959.53003},
};
const vec3_t tears_quad[] = {
{1792, 1155.53003, 240},
{1792, 1030.32996, 240},
{1792.01001, 1030.32996, 240},
{1792.01001, 1155.53003, 240},
};
const vec3_t tears_quad2[] = {
{304, 3248, 3208},
{-61.2307014, 3248, 3208},
{-61.2307014, 3248, 3192},
{304, 3248, 3192},
};
const vec3_t tears_cluster[] = {
{551.638, -439.277008, 2804.63989},
{551, -438, 2806.02002},
{555.999023, -447.998993, 2805.1499},
{555.999023, -447.998993, 2804.32007},
{551.638, -439.277008, 2804.63989},
{555.999023, -447.998993, 2804.32007},
{555.999023, -447.998993, 2795.19995},
{550.97699, -437.954987, 2806.02002},
{551, -438, 2806.02002},
{555.999023, -447.998993, 2795.19995},
{555.999023, -447.998993, 2794.6499},
{550.978027, -437.954987, 2806.02002},
{545.945984, -442.945007, 2804.78003},
{546, -442.998993, 2804.77002},
{546, -443, 2804.69995},
{546, -443, 2804.78003},
{545.945007, -442.945007, 2804.78003},
{556, -448, 2794.6499},
{556, -448, 2805.1499},
{546, -443, 2804.78003},
{546, -443, 2804.69995},
{550.97699, -437.954987, 2806.02002},
{556, -448, 2794.6499},
{546.000977, -443, 2804.69995},
{545.945007, -442.945007, 2804.78003},
};
const vec3_t tears_cluster2[] = {
{-2160, -192, -704.242004},
{-2160, -192, -662},
{-2160, -196, -658},
{-2160, -220, -646},
{-2160, -222.332001, -645.416992},
{-2160, -320, -752},
{-2160, -192, -752},
{-2160, -192, -704.242004},
{-2160, -222.332001, -645.416992},
{-2160, -244, -640},
{-2160, -268, -640},
{-2160, -292, -646},
{-2160, -316, -658},
{-2160, -320, -662},
{-2160, -196, -814},
{-2160, -192, -810},
{-2160, -192, -752},
{-2160, -320, -752},
{-2160, -320, -810},
{-2160, -316, -814},
{-2160, -312, -816},
{-2160, -200, -816},
{-2174, -334, -676},
{-2186, -346, -700},
{-2192, -352, -724},
{-2192, -352, -748},
{-2186, -346, -772},
{-2174, -334, -796},
{-2160, -319.998993, -810},
{-2160, -319.998993, -661.999023},
{-2174, -178, -796},
{-2186, -166, -772},
{-2192, -160, -748},
{-2192, -160, -724},
{-2186, -166, -700},
{-2174, -178, -676},
{-2160, -192, -662},
{-2160, -192, -810},
{-2224, -320, -810},
{-2224, -330, -800},
{-2224, -320, -800},
{-2224, -200, -816},
{-2224, -312, -816},
{-2224, -316, -814},
{-2224, -320, -810},
{-2224, -320, -800},
{-2224, -192, -800},
{-2224, -192, -810},
{-2224, -196, -814},
{-2224, -192, -800},
{-2224, -182, -800},
{-2224, -192, -810},
{-2224, -330, -800},
{-2224, -334, -796},
{-2224, -178, -796},
{-2224, -182, -800},
{-2224, -334, -796},
{-2224, -346, -772},
{-2224, -351, -752},
{-2224, -161, -752},
{-2224, -166, -772},
{-2224, -178, -796},
{-2224, -351, -752},
{-2224, -352, -748},
{-2224, -352, -724},
{-2224, -351, -720},
{-2224, -161, -720},
{-2224, -160, -724},
{-2224, -160, -748},
{-2224, -161, -752},
{-2224, -351, -720},
{-2224, -346, -700},
{-2224, -334, -676},
{-2224, -316, -658},
{-2224, -292, -646},
{-2224, -268, -640},
{-2224, -244, -640},
{-2224, -220, -646},
{-2224, -196, -658},
{-2224, -178, -676},
{-2224, -166, -700},
{-2224, -161, -720},
};
// random numbers dug this up. needed more than 6 iterations
const vec3_t cloud_points[] = {
{1.70695281, 2.60889673, 2.86233163},
{2.11825109, 2.59883952, 1.48193693},
{2.76728868, 1.57646465, 2.39769602},
{1.88795376, 2.73980999, 1.58031297},
{2.79736757, 1.89582968, 1.80514407},
};
struct {
const vec3_t *points;
int num_points;
sphere_t expect;
} tests[] = {
{0, 0, {{ 0, 0, 0}, 0}},
{points, 1, {{-1, -1, 1}, 0}},
{points, 2, {{ 0, 0, 1}, 1.41421356}},
{points, 3, {{-0.333333343, 0.333333343, 0.333333343}, 1.63299322}},
{points, 4, {{0, 0, 0}, 1.73205081}},
{tears_triangle, SIZEOF (tears_triangle),
{{2201.84521, -1262, -713.519531}, 0.0747000724}},//FIXME numbers?
{tears_cluster, SIZEOF (tears_cluster),
{{552.678101, -443.460876, 2800.40405}, 8.04672813}},//FIXME numbers?
{tears_quad, SIZEOF (tears_quad),
{{1792.005, 1092.92999, 240}, 62.6000302}},
{tears_triangle2, SIZEOF (tears_triangle2),
{{-519.995972, 1111.97498, -2592.03516}, 0.0300767105}},//FIXME numbers?
{tears_quad2, SIZEOF (tears_quad2),
{{121.384659, 3248, 3200}, 182.790497}},
{tears_triangle3, SIZEOF (tears_triangle3),
{{284.117493, 624.235535, 2959.76489}, 0.352925777}},
{tears_cluster2, SIZEOF (tears_cluster2),
{{-2192, -256.000031, -736}, 103.479492}},//FIXME numbers?
{cloud_points, SIZEOF (cloud_points),
{{2.20056152, 2.23369908, 2.2332375}, 0.88327992}},
};
#define num_tests SIZEOF (tests)
static inline float
rnd (mtstate_t *mt)
{
union {
uint32_t u;
float f;
} uf;
do {
uf.u = mtwist_rand (mt) & 0x007fffff;
} while (!uf.u);
uf.u |= 0x40000000;
return uf.f - 1.0;
}
int
main (int argc, const char **argv)
{
int res = 0;
size_t i, j;
sphere_t sphere;
mtstate_t mt;
double start, end;
for (i = 0; i < num_tests; i ++) {
sphere = SmallestEnclosingBall (tests[i].points, tests[i].num_points);
if (VectorDistance_fast (sphere.center, tests[i].expect.center) > 1e-4
|| fabs (sphere.radius - tests[i].expect.radius) > 1e-4) {
res = 1;
printf ("test %d failed\n", (int) i);
printf ("expect: {%.9g, %.9g, %.9g},%.9g\n",
VectorExpand (tests[i].expect.center),
tests[i].expect.radius);
printf ("got : {%.9g, %.9g, %.9g},%.9g\n",
VectorExpand (sphere.center),
sphere.radius);
}
}
mtwist_seed (&mt, 0);
start = Sys_DoubleTime ();
for (i = 0; !res && i < 1000000; i++) {
vec3_t cloud[10];
sphere_t seb;
vec_t r2;
for (j = 0; j < 5; j++) {
VectorSet (rnd (&mt), rnd (&mt), rnd (&mt), cloud[j]);
}
seb = SmallestEnclosingBall ((const vec_t (*)[3]) cloud, 5);
r2 = seb.radius * seb.radius;
for (j = 0; j < 5; j++) {
if (VectorDistance_fast (cloud[j], seb.center) - r2
> 1e-5 * r2) {
res = 1;
printf ("%d %.9g - %.9g = %.9g\n", (int)j,
VectorDistance_fast (cloud[j], seb.center), r2,
VectorDistance_fast (cloud[j], seb.center) - r2);
printf ("[%.9g %.9g %.9g] - [%.9g %.9g %.9g] = %.9g > %.9g\n",
VectorExpand (cloud[j]), VectorExpand (seb.center),
VectorDistance_fast (cloud[j], seb.center), r2);
}
}
}
end = Sys_DoubleTime ();
printf ("%d iterations in %gs: %g iters/second\n", (int) i, end - start,
i / (end - start));
return res;
}